Pre heat oven to 350. Wash, halve and bake squash in 1 inch water for 30 min.
Saute onions and garlic, celery, mushrooms and or zucchini for 10 min. in butter. Mix in everything else. Fill and bake squash for an additional 20 min covered. Serves 4 or more as a full dish.
It was a refreshing yet warming change